Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.6 Perform Operations with Complex Numbers - Guided Practice for Example 1 - Page 275: 4


$$ x=2\sqrt{7}i$$

Work Step by Step

We know that: $$\sqrt{-1}=i$$ Thus, we simplify the expression, replacing the square root of -1 with i when possible: $$x^2=-28 \\ x=\sqrt{-28} \\ x=2\sqrt{7}i$$
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